They gave me a 60% chance when I had RT for G9T3N?M0 back in 2008.
For a couple of years everything was fine, I was off all treatment even HT, getting my life and health back to normal.
Then it came back in 2013 with doubling PSA etc so it was back on HT.
Last year I had a second drink in the last chance saloon, they gave me salvage HDR Brachytherapy, yes you can have RT twice now.
They didn't give me any odds second time around, they have only been doing RT twice for a very few years and do not have enough patient histories to base any statistics on.
My Consultant is honest enough to admit that he doesn't really know what my target PSA should be after two bouts of RT, but he seems satisfied that at 0.2 over 12 months later is good enough.
Full detail in my profile.